Smoke-consuming furnace



(No Model.) asneets-shem 1. D. GLBGG.

SMOKE CONSUMING FURNAGE. N0. 415,959.. Patented Nov. 26, 1889.-

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(No Model.) 2 Sheets-Sheet 2..

D. GLEGG. SMOKE CONSUMING PURNAGB,

No. 415,959. Patented Nov. 26, 1889.

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UNITED STATES PATENT OFFICE.

DAVID LEGG, ()l. 'IIIILADEIJIIIA, PENNSYLVANIA.

SMOKE-CONSUMING FURNACE.

SPECIFICATION forming part of I..-etters Patent No. 415,959, datedNovember 26, 1889.

Application filed August 29, 1889. Serial No. 322,326. (No model.)

To (1, 1127110111 it may concern/1.:

' 3e it known that 1, DAVID ("LEGG, a citizen of the United States, anda resident of Philadelphia, Pennsylvania, have invented aSmoke-(ionsuming Furnace, of: which the following is a specification.

The object of my invention is to construct devices for attachment tolocomotives, by which the smoke and cinders are carried from the stackinto the ash-pit and there consumed.

In the accompanying drawings, Figure 1 is a longitudinal section ofsuffieient of a locomotive to illustrate my invention. Fig. 2 is atransverse section through the smoke-stack on the line 1 2, Fig. 1. Fig.3 is a transverse section on the line 3 at, Fig. 1.. Figs. 4 and 5 aresections of the smoke-stack on the line 5 6, Fig. 2, showing thedraft-regulator in different positions. Fig. 6 is a perspective view ofthe upper portion of the stack. Fig. 7 is a section of the stack on theline L8, Fig. 1; and Fig. 8 is a view 01' a modified form of stack.

A is the boiler of the locomotive; B, the combustion-chamber; theash-pit, and I) the grate.

I) is the smoke-box, having the usual exhaust-nozzles from thecylinders, and F. is the stack. The stack in the present instance is ofthe peculiar form shown in Figs. 1 and 2,7

and is provided with three passage-ways c c e The central passage-way ecommunicates with the smoke-box I) at the bottom and communicates withthe downflues c e at the top. A hood F is placed over the upper ends ofthe fines and has dividing-plates ff, which pass down each of the fines,so that the smoke and cinders from the combustion-chamber pass up thecentral flue and are guided down the outer fines e e by the hood F. Theside flucs communicate with a longitudinal flue E through passages oneat each side of the smoke-box. The passage E extends to and communicateswith the ash-pit, as shown in Fig. 1, so that any smoke of cinders thatpass through the passages c, a, and E are .directed into the aslrpit,the larger cinders falling to the bottom of the ash-pit, while the smokeand lighter cinders pass through the fuel on the grate I) and areconsumed.

In order to create sufficient draft to carry the cinders and smoke intothe ash-pit, I provide a f unnel-shaped head G, situated at the upperend of the smoke-stack. This head has a flaring mouth g, and ispreferably provided with a screen 9. On the upper portion of the head isan opening 71, provided with a valve III, hinged at h. This valve has anarm 78*, which is connected, through the me dium of rods 1' and abell-crank lever i, with a hand-lever I in the cab of the engine, sothat when the locomotive is standing-as, for instance, at a station--theengineer can raise the valve ll and permit the smoke to pass out of thestack. As soon as the engine pulls out from the station the engineerreverses the lever I, thus closing the valve II, so that air passesthrough the head G and into the side passages e 6 thus causing a forceddraft and forcing the cinders and smoke into the ash-pit.

To increase the draft where circumstances require, I cut an opening a inthe front of each side passage 6 e and insert .in the opening pivotedslats a, connected after the manner of a whidow-blind, one of the slatshaving an arm ct linked to a lever a, which in turn is connected to therod 5, so that when the valve ll is closed, as shown in Fig. 4, theslats cause the air to pass downward into the side flues c 6 and thusadd to the force of the draft in carrying the cinders and smoke to theash-pit; but when the valve is raised to the position shown in Fig. 5the slats are reversed and the air is permitted to pass upward into theside flues e 6 thus aiding in carrying the smoke out through the top of;the stack. These slats can be worked independently of the Valve II, ifdesired, so that they can be closed when it is required to cut oh. theair through the openings a.

In the modification shown in Fig. 8,instead of the down passages beingat the sides of the central passage 6, said down passages are in frontand rear of the central passage, and in this case only the front downpassage is provided with slats.

I claim as my invention 1. The combination of the combustion chamber andash-pit with the smoke-stack open. at its upper end and havingcommunieating, up and down fines with a deflectinghood, and a valvedinlet-opening in the clownllne, substantially as described.

2. The combination of the smoke-stack pro- 5 Vl(l0(l with up and downlines, the deflectinghood, the head having an air-inlet opening;-eon'nnnnicating with the downflnes, and a valved opening in the upperportion of said hoad,an l niecl'ianisin 'i Ol' operating thc'valve mfrom the cab of the engine, substantially as described.

!l. The eo1nl' ination ol the Slil0l e-stacl having; up and down fineswith openings in said tlOWlilllflCS, and slat-s in each of said openings15 for directing air into the stack and creating a draft in thedownfincs for carrying the smoke to the ash-pit, substantially aslescribed.

4. The combination of the stack having up 2 and (Town lines, openings insaid downfines with pivoted slats in said openings, said slats beingcontrolled from the cab of the engine, so as to regulate the draft,snbst-antialty as described.

5. The combination 0! thesmoke-stack, llnup and down lines therein avalved opening to this specification in the n'esence of two szll 5scribing witnesses.

l i\\'ll) (liltmt Witnesses:

ll ENRY l lows m, l'lAl'lllY Siu'rn.

